Java 9 features | Java 9 | Java 9 Tutorial
Java 9 features | Java 9 | Java 9 Tutorial | features of Java 9:
1. Private Interface Methods
2. Try-With Resources
3. Anonymous Inner Classes Improvement
4. @SafeVarargs Annotation
5. Java 9 Factory Methods
Features:
1. Private Interface Methods: In Java 9, we can create private methods inside an interface. Interface allows us to declare private methods that help to share common code between non-abstract methods.
2. Try-With Resources: Java introduced try-with-resource feature in Java 7 that helps to close resource automatically after being used.
In other words, we can say that we don't need to close resources (file, connection, network etc) explicitly, try-with-resource close that automatically by using AutoClosable interface.
In Java 7, try-with-resources has a limitation that requires resource to declare locally within its block.
3. Anonymous Inner Classes Improvement: Java 9 introduced a new feature that allows us to use diamond operator with anonymous classes. Using the diamond with anonymous classes was not allowed in Java 7.
4. @SafeVarargs Annotation: It is an annotation which applies on a method or constructor that takes varargs parameters. It is used to ensure that the method does not perform unsafe operations on its varargs parameters.
It was included in Java7 and can only be applied on Final methods, Static methods, Constructors. From Java 9, it can also be used with private instance methods.
5. Java 9 Factory Methods: Java 9 Collection library includes static factory methods for List, Set and Map interface. These methods are useful to create small number of collection.
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